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Why was the tripod design proposal for building the CN Tower abandoned in favor of the design that was actually built. Also, would it be possible to build the proposal for the tripod CN Tower in another city that does not yet have a public observation point to look out over the skyline and surrounding area.
I'm assuming that you mean the three-legged structure that was in early proposals for Metro Centre, back in the late 1960s?
I'm no engineer, but I doubt that there would be any way that an 1815-foot tower could be built on that design. Maybe if its use was solely as a broadcasting mast--after all, there are taller guyed towers--but not as one that would act as a tourist attraction, restaurant, etc. If you want that, you're going to need something a lot more solid.
As I recall, the CN Tower was built using slip-form construction. Concrete was poured into a form, let dry, then the form was raised (slipped up), shrunk a little, and concrete was poured again. And up it went. The foundation, down into bedrock, and the slip-form construction, means that it is still standing, forty-plus years later, safe for tourists, and shows no sign of falling down any time soon.
I was in the restaurant up there that day and was about to complain about my Crème-Brulee not having the sugar crust evenly melted enough when that thing came through, took out the other half of the restaurant and very nicely resolved my Crème Brulee complaint. They got a good tip.
That was a fragment of the meteorite that was seen over Chelyabinsk a few years ago. It was kept quiet so that it wouldn't affect the tourism industry, and luckily they had a spare one in a undisclosed location for an event just as this.
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